with powerful build-in router functions. Support NAT and NAT traversal

use powerful digital signal processor (DSP) hardware to insure clear voice with high quality. With specific processor for carrying out arithmetic immediately to eliminate or reduce at its maximum the impact cause by the internet delay or packet losing

support G.711A, G.711u, G.723, G.729A/B encryption algorithm

support redundant RTP, used under the terrible internet environment for the purpose to improve the voice quality between terminals

support pass-through port, you can switch from one mode to another conveniently by pressing a hot-key at any moment

Support switching between two gatekeepers by pressing the hot-key

Support VAD , CNG and EC

support transfer DTMF both in band and out band and the dial rules based on E.164

system configuration and upgrade conveniently by traditional telephone or WEB

eliminate the problem of internet blocking and private net traversal equipped with special VPN server

achieved the purpose for long distance centralized management and automatically software upgrade coordinated with special gateway platform

the same kind of hardware can support SIP/H.323 through upgrade, without repeated investment in terminals caused by platform switch